Stellar Archaeology as a Time Machine to the First Stars

Session

Transition to Pop II, Zcrit

5 Dec 2018, 09:50

Lecture Hall (Kavli IPMU)

23. External Enrichment as a Pathway to Metal-Poor Star Formation

Dr Britton Smith (University of California, San Diego)

05/12/2018, 09:50

Transition to Pop II formation (dust cooling, critical metallicity)

The physical conditions required for forming the first low mass stars are now understood to be a critical amount of heavy elements and some degree of turbulence to seed fragmentation. However, the transition from Population III to Population II has yet to be characterized in a global context. The process of external enrichment, in which a star-less halo is promptly enriched by the blast-wave...

12. The first supernovae and the origins of metal-poor stars

Dr Ke-Jung (Ken) Chen (ASIAA)

05/12/2018, 10:20

Transition to Pop II formation (dust cooling, critical metallicity)

Metals from Population III (Pop III) supernovae led to the formation of less massive Pop II stars in the early universe, altering the course of evolution of primeval galaxies and cosmological reionization. There are a variety of scenarios in which heavy elements from the first supernovae were taken up into second-generation stars, but cosmological simulations only model them on the largest...

52. Metal Mixing in Primordial Minihaloes and the Abundances in EMP Stars

Mr Mattis Magg (ITA/ZAH University of Heidelberg)

05/12/2018, 10:40

EMP stars

There have been many attempts to investigate the first stars by analysing extremely metal-poor stars. Often, these studies rely on the assumption that the abundances observed in old, extremely metal-poor stars directly correspond to the yields of a single Pop III supernova (SN). We run high-redshift cosmological simulations to test this assumption. In these simulations we model the formation...